<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrap">
                        <div class="button">{{this.$store.state.city}}</div>
                    </div> 
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrap" v-for="hotCities of hot" :key="hotCities.id" @click="handleCityClick(hotCities.name)">
                        <div class="button">{{hotCities.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
                
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
    name:'CityList',
    mounted(){
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    methods:{
        handleCityClick(city){
            //派发一个名字为changeCity的Actions，把city传过去
            this.$store.commit('cityChange',city)
            this.$router.push('/')
        }
    },
    //接收从父组件传过来的值
    props:{
        hot:Array,
        cities:Object,
        letter:String
    },
    watch:{
        letter(){
            if(this.letter){
                const element = this.$refs[this.letter][0];//取到对应地区
                this.scroll.scrollToElement(element)
            }
            
        }
    }
}
</script>

<style lang="less" scoped>
    @import '~styles/varibles.less';
    .border-topbottom{
        &:before{
            border-color: #ccc
        }
        &:after{
            border-color: #ccc
        }
    }
    .border-bottom{
        &:before{
            border-color: #ccc
        }
    }
    .list{
        overflow: hidden;
        position: absolute;
        top:1.58rem;
        left: 0;
        right: 0;
        bottom: 0;
        .title{
        line-height: .54rem;
        background: #eee;
        padding-left: .2rem;
        color: #666;
        font-size: .26rem;
    }
    .button-list{
        overflow: hidden;
        padding: .1rem .6rem .1rem;
        .button-wrap{
            float: left;
            width: 33.33%;
            .button{
                text-align: center;
                padding: .1rem 0;
                margin: .1rem;
                border: .02rem solid #ccc;
                border-radius: .06rem;
            }
        }
    }
    .item-list{
        .item{
            line-height: .76rem;
            padding-left: .2rem
        }
    }
    }
    
</style>


